
/* Derived from the LibTomCrypt library (authored by Tom St Denis)  */

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>

#include "ltc_gcm.h"

#define ENCRYPT 0
#define DECRYPT 1

int gcm_memory( const uint_8t key[], unsigned long key_len,
                const uint_8t iv[], unsigned long iv_len,
                const uint_8t data[], unsigned long data_len,
                uint_8t pt[], unsigned long pt_len,
                uint_8t ct[],
                uint_8t tag[], unsigned long taglen,
                int dir , int *stat);

static const struct
{
    unsigned char K[32];
    int keylen;
    unsigned char P[64];
    unsigned long ptlen;
    unsigned char A[64];
    unsigned long alen;
    unsigned char IV[64];
    unsigned long IVlen;
    unsigned char C[64];
    unsigned char T[16];
} tests[] =
{
    /* test case #1 */
    {
        /* key */
        {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        },
        16,

        /* plaintext */
        {
            0
        },
        0,

        /* AAD data */
        {
            0
        },
        0,

        /* IV */
        {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00
        },
        12,

        /* ciphertext  */
        {
            0
        },

        /* tag */
        {
            0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
            0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a
        }
    },

    /* test case #2 */
    {
        /* key */
        {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        },
        16,

        /* PT */
        {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        },
        16,

        /* ADATA */
        {
            0
        },
        0,

        /* IV */
        {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00
        },
        12,

        /* CT */
        {
            0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
            0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78
        },

        /* TAG */
        {
            0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
            0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf
        }
    },

    /* test case #3 */
    {
        /* key */
        {
            0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
            0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
        },
        16,

        /* PT */
        {
            0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
            0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
            0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
            0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
            0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
            0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
            0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
            0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55,
        },
        64,

        /* ADATA */
        {
            0
        },
        0,

        /* IV */
        {
            0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
            0xde, 0xca, 0xf8, 0x88,
        },
        12,

        /* CT */
        {
            0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
            0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
            0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
            0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
            0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
            0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
            0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
            0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85,
        },

        /* TAG */
        {
            0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
            0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4,
        }
    },

    /* test case #4 */
    {
        /* key */
        {
            0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
            0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
        },
        16,

        /* PT */
        {
            0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
            0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
            0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
            0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
            0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
            0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
            0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
            0xba, 0x63, 0x7b, 0x39,
        },
        60,

        /* ADATA */
        {
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xab, 0xad, 0xda, 0xd2,
        },
        20,

        /* IV */
        {
            0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
            0xde, 0xca, 0xf8, 0x88,
        },
        12,

        /* CT */
        {
            0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
            0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
            0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
            0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
            0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
            0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
            0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
            0x3d, 0x58, 0xe0, 0x91,
        },

        /* TAG */
        {
            0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
            0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47,
        }

    },

    /* test case #5 */
    {
        /* key */
        {
            0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
            0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
        },
        16,

        /* PT */
        {
            0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
            0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
            0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
            0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
            0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
            0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
            0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
            0xba, 0x63, 0x7b, 0x39,
        },
        60,

        /* ADATA */
        {
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xab, 0xad, 0xda, 0xd2,
        },
        20,

        /* IV */
        {
            0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
        },
        8,

        /* CT */
        {
            0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a,
            0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55,
            0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8,
            0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23,
            0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2,
            0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42,
            0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07,
            0xc2, 0x3f, 0x45, 0x98,
        },

        /* TAG */
        {
            0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
            0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb,
        }
    },

    /* test case #6 */
    {
        /* key */
        {
            0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
            0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
        },
        16,

        /* PT */
        {
            0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
            0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
            0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
            0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
            0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
            0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
            0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
            0xba, 0x63, 0x7b, 0x39,
        },
        60,

        /* ADATA */
        {
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
            0xab, 0xad, 0xda, 0xd2,
        },
        20,

        /* IV */
        {
            0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
            0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
            0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
            0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
            0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
            0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
            0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
            0xa6, 0x37, 0xb3, 0x9b,
        },
        60,

        /* CT */
        {
            0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6,
            0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94,
            0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8,
            0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7,
            0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90,
            0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f,
            0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03,
            0x4c, 0x34, 0xae, 0xe5,
        },

        /* TAG */
        {
            0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
            0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50,
        }
    }

    /* rest of test cases are the same except AES key size changes... ignored... */
};

int gcm_test( void )
{
    unsigned long x, y;
    unsigned char out[2][64], T[2][16];
    int stat;

    /* find aes */
    for( x = 0; x < (int)(sizeof(tests) / sizeof(tests[0])); x++ )
    {
        y = sizeof( T[0] );
        gcm_memory(tests[x].K, tests[x].keylen, tests[x].IV, tests[x].IVlen,
            tests[x].A, tests[x].alen, (unsigned char *)tests[x].P, tests[x].ptlen, out[0], T[0],
            y, ENCRYPT, 0);

        if( memcmp(out[0], tests[x].C, tests[x].ptlen) )
        {
#if 1
            printf( "\nCiphertext wrong %lu\n", x );
            for( y = 0; y < tests[x].ptlen; y++ )
            {
                printf( "%02x", out[0][y] & 255 );
            }

            printf( "\n" );
#endif
            return RETURN_ERROR;
        }

        if( memcmp(T[0], tests[x].T, 16) )
        {
#if 1
            printf( "\nTag on plaintext wrong %lu\n", x );
            for( y = 0; y < 16; y++ )
            {
                printf( "%02x", T[0][y] & 255 );
            }

            printf( "\n" );
#endif
            return RETURN_ERROR;
        }

        y = sizeof( T[1] );
        gcm_memory(tests[x].K, tests[x].keylen, tests[x].IV, tests[x].IVlen,
            tests[x].A, tests[x].alen, out[1], tests[x].ptlen, out[0], T[0], y, DECRYPT, &stat);

        if( memcmp(out[1], tests[x].P, tests[x].ptlen) )
        {
#if 1
            printf( "\nplaintext wrong %lu\n", x );
            for( y = 0; y < tests[x].ptlen; y++ )
            {
                printf( "%02x", out[0][y] & 255 );
            }

            printf( "\n" );
#endif
            return RETURN_ERROR;
        }

        if( stat != RETURN_OK )
        {
#if 1
            printf( "\nTag on ciphertext wrong %lu\n", x );
            for( y = 0; y < 16; y++ )
            {
                printf( "%02x", T[1][y] & 255 );
            }

            printf( "\n" );
#endif
            return RETURN_ERROR;
        }

    }

    return RETURN_OK;
}


int main(void)
{
    gcm_test();
    return RETURN_OK;
}
